...and this for everyone who suffers from the silly gaudy childish look of OS X and misses the clean elegance of OS 9 (it not necessarily the extension conflicts and the lousy task-threading).
1) The
Classic Platinum Theme. Installable on OS X using either unsanity.com's ShapeShifter or Duality 4
2)
X-Assist or
ASM to give you an application switching menu in your menubar.
3)
FruitMenu to give you back an editable / customizable Apple Menu, to give you a hierarchical menu-view of System Prefs so you don't have to launch the entire %&## System Preferences pane
and then reach with your mouse a second time to invoke the specific PrefsPane you want. And to use as a launcher.
4)
WindowShade X, to be able to minimize windows the classic Macintosh way, not like some Windows PC-wannabe. (Will also minimize-in-place to a small icon)
5)
PullTab, to pry that damn Dock's filthy hands off the keystoke combo Command-Tab, thus freeing it up for apps with original rights to it, like FileMaker Pro.
6) To get your Trash can onto the Desktop where it belongs, there are several apps that purport to be able to do so, but I prefer to just use TinkerTool to make everything visible in the Finder, then make an alias to .Trash and put the alias on the Desktop. Find a nice MacOS 9ish Trashcan icon on the internet and paste.
7) Now to dispense with the godforsaken Dock itself. Two choices: you can minimize it practically out of existence by pinning it to the left edge of your screen and then edit com.apple.dock.plist in a text editor, manually changing the tilesize parameter to 1, which will give you a Dock about the size of a pinhead in a place where you won't mouse-over on it very often by accident; or you can nuke it entirely. To nuke it entirely, first copy Dock.app from /System/Library/CoreServices and make that copy a startup item for every user account on your machine (towards the top of the list); then make an AppleScript consisting of
tell application "Dock"; quit; end tell, save it as an application, and add that to your startup items (towards the end); then, finally, sudo rm the original Dock.app from within CoreServices. Hickory Dickory, baby